The Flash TV Show: What We Know So Far About Arrow's Spin-off

Much like how Iron Man, Thor, Captain America and Hulk can come together to form The Avengers on the big screen, the Flash TV show and Arrow exist in the same universe, and there's a pretty good chance we will end up seeing a good amount of crossover between the two. As mentioned, Grant Gustin’s Barry Allen already appeared on two episodes of the established superhero show, and they wound up creating a pretty cool origin story. Caitlin Snow, played by Danielle Panabaker, and Cisco Ramon, played by Carlos Valdes have also appeared on Arrow. Given that the two projects will be set in different cities they will act independently and have their own stories, but crossover is definitely something we should expect. And we already know that Oliver Queen will be showing up in the Flash pilot!